A new accelerator control system is being implemented as part of the development of the Holifield Radioactive Ion Beam Facility (HRIBF), a first generation radioactive ion beam (RIB) facility. The pre-existing accelerator control systems are based on 1970's technology and addition or alteration of controls is cumbersome and costly. A new, unified control system for the cyclotron and tandem accelerators, the RIB injector, ion sources, and accelerator beam lines is based on a commercial product from Vista Control Systems, Inc. Several other accelerator facilities, as well as numerous industrial sites, are now using this system. The control system is distributed over a number of computers which communicate over Ethernet and is easily extensible. Presently, implementation at the HRIBF is based on VAX/VMS, VAX/ELN, VME, and Allen-Bradley PLC5 programmable logic controller architectures. Expansion to include UNIX platforms and CAMAC hardware support is planned. Operator interface is via X-terminals. The system has proven to be quite powerful, yet it has been easy to implement with a small staff. A Vista users group has resulted in shared software to implement specific controls. This paper details present system features and future implementations at the HRIBF.

/pdf/control-system-for-the-holifield-radioactive-ion-beam-4qm5h1kzkg.pdf

Control system for the Holifield Radioactive Ion Beam Facility

The Holifield Radioactive Ion Beam Facility (HRIBF) construction project has been completed and the first radioactive ion beam has been successfully accelerated. The project, which began in 1992, has involved numerous facility modifications. The Oak Ridge Isochronous Cyclotron has been converted from an energy booster for heavy ion beams to a light ion accelerator with internal ion source. A target-ion source and mass analysis system have been commissioned as key components of the facility's radioactive ion beam injector to the 25 MV tandem electrostatic accelerator. Beam transport lines have been completed, and new diagnostics for very low intensity beams have been developed. Work continues on a unified control system. Development of research quality radioactive beams for the nuclear structure and nuclear astrophysics communities continues. This paper details facility development to date.

/pdf/development-of-the-holifield-radioactive-ion-beam-facility-3h92jzwzwx.pdf

Development of the Holifield Radioactive Ion Beam Facility

Controls for accelerators and associated systems at the Holifield Radioactive Ion Beam Facility (HRIBF) at Oak Ridge National Laboratory have been migrated from 197Os-vintage minicomputers to a modern system based on Vista and EPICS toolkit software. Stability and capabilities of EPICS software have motivated increasing use of EPICS for accelerator controls. In addition, very inexpensive subsystems based on EPICS and the EPICS portable CA server running on Linux PCs have been implemented to control an ion source test facility and to control a building-access badge reader system. A new object-oriented, extensible display manager has been developed for EPICS to facilitate the transition to EPICS and will be used in place of MEDM. EPICS device support has been developed for CAMAC serial highway controls.

/pdf/migration-of-1970s-minicomputer-controls-to-modern-toolkit-1a9tq3hcb5.pdf

Migration of 1970s Minicomputer Controls to Modern Toolkit Software

The Holifield Radioactive Ion Beam Facility (HRIBF) is a first generation radioactive ion beam (RIB) facility. Project construction commenced in FY'93 with the initial emphasis placed on conversion of a heavily shielded room from an experiment area to an area suitable for housing the RIB Injector. The RIB Injector is the central component of the RIB project. The Injector consists of two connected high voltage platforms which are operate at -300 kilovolts and which are separated by a shield wall. One platform houses controls, instrumentation, and power supplies. The second platform houses an ISOLDE type target/ion source (TIS) which will be bombarded with light-ion beams from the Oak Ridge Isochronous Cyclotron (ORIC). Additionally, this platform houses the first stage mass separator system which is designed for 1 part in 1000 mass resolution, electrostatic quadrupole lenses for beam transport, and a cesium charge exchange cell for conversion of positive ions to negative ions for injection into the Tandem Accelerator. This paper details the design and beam development aspects of the RIB Injector.

/pdf/status-of-the-radioactive-ion-beam-injector-at-the-holifield-7ct1v3dbx0.pdf

Status of the radioactive ion beam injector at the Holifield Radioactive Ion Beam Facility

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Status of the radioactive ion beam injector at the Holifield Radioactive Ion Beam Facility

Development of the Holifield Radioactive Ion Beam Facility